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Review Question - QID 181

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QID 181 (Type "181" in App Search)
A 33-year-old man sustains a femur fracture in a motorcycle accident. AP and lateral radiographs are provided in Figure A. Prior to surgery, a CT scan of the knee is ordered for preoperative planning. Which of the following additional findings is most likely to be discovered?
  • A

Tibial eminence fracture

2%

37/2167

Sagittal plane fracture of the medial femoral condyle

13%

287/2167

Schatzker I tibia plateau fracture

2%

50/2167

Coronal plane fracture of the lateral femoral condyle

79%

1711/2167

Axial plane fracture through the medial femoral condyle

3%

67/2167

  • A

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The "Hoffa fracture" is a coronal plane fracture of the femoral condyle that is often missed on plain radiographs of supracondylar and intercondylar femur fractures. It involves the lateral condyle more frequently than the medial. Identification is important as it may impact operative planning and likely require screw fixation in the anteroposterior plane.

Nork et al. reviewed 202 supracondylar-intercondylar distal femoral fractures and found a 38% prevalence of associated coronal plane fractures. The authors recommend CT scan imaging of all supracondylar and intercondylar fractures.

Ostermann et al reported on 24 unicondylar fractures of the distal femur treated with open reduction internal fixation with a screw construct. Twenty-three patients acheived satisfactory results at 5 year follow-up. Illustrations A and B are another example of a supracondylar femur fracture with an associated Hoffa fracture identified on CT scan.

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